如何解決「錯誤 - [ICPSD]驅動程序的無效組合」？

Question

我想調試我的代碼如下所示。我對SystemVerilog相當陌生，希望我能從中學習到。讓我知道任何建議。

**我收到的錯誤是：

Error-[ICPSD] Invalid combination of drivers 
    Variable "Q" is driven by an invalid combination of structural and 
    procedural drivers. Variables driven by a structural driver cannot have any 
    other drivers. 
    "divide.v", 13: logic [7:0] Q; 
    "divide.v", 16: divide8bit testcase1(x, y, clk, Q, R); 
    "divide.v", 23: Q = 8'b0; 

    Error-[ICPSD] Invalid combination of drivers 
    Variable "R" is driven by an invalid combination of structural and 
    procedural drivers. Variables driven by a structural driver cannot have any 
    other drivers. 
    "divide.v", 13: logic [7:0] R; 
    "divide.v", 16: divide8bit testcase1(x, y, clk, Q, R); 
    "divide.v", 24: R = y; 

**我的SystemVerilog代碼是：

module divide8bit(
    input logic [7:0] x,y, 
    input logic clk, 
    output logic [7:0] Q,R); 

    always_ff @(posedge clk) 
    begin 
     R <= R-x; 
     Q <= Q + 8'd1; 
    end 
endmodule 

module test1; 

    logic [7:0] x,y,Q,R; 
    logic clk; 

    divide8bit testcase1 (x,y,clk,Q,R); 

    initial 
    begin 
      x = 8'd2; 
      y = 8'd8; 
      Q = 8'd0; 
      R = y; 
      clk = 1'd0; 
      while(x <= R) 
       begin 
        #5 clk = ~clk; 
       end 
      #5 $finish; 
     end 
endmodule 

Answer 1

Same problem這裏：你在裏面module test1分配給Q和R。同時module testcase1也在嘗試分配到Q和R。不要分配給Q和R test1！